1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.search.lucene;
24  
25  import com.liferay.portal.kernel.util.CharPool;
26  import com.liferay.portal.kernel.util.FileUtil;
27  import com.liferay.portal.kernel.util.Validator;
28  import com.liferay.portal.util.PropsValues;
29  
30  import java.io.BufferedInputStream;
31  import java.io.ByteArrayInputStream;
32  import java.io.File;
33  import java.io.FileInputStream;
34  import java.io.IOException;
35  import java.io.InputStream;
36  
37  import org.apache.lucene.document.Field;
38  
39  /**
40   * <a href="LuceneFileExtractor.java.html"><b><i>View Source</i></b></a>
41   *
42   * @author Brian Wing Shun Chan
43   */
44  public class LuceneFileExtractor {
45  
46      public Field getFile(String field, InputStream is, String fileExt) {
47          String text = FileUtil.extractText(is, fileExt);
48  
49          if (Validator.isNotNull(
50                  PropsValues.LUCENE_FILE_EXTRACTOR_REGEXP_STRIP)) {
51  
52              text = regexpStrip(text);
53          }
54  
55          return LuceneFields.getText(field, text);
56      }
57  
58      public Field getFile(String field, byte[] bytes, String fileExt) {
59          InputStream is = new BufferedInputStream(
60              new ByteArrayInputStream(bytes));
61  
62          return getFile(field, is, fileExt);
63      }
64  
65      public Field getFile(String field, File file, String fileExt)
66          throws IOException {
67  
68          InputStream is = new FileInputStream(file);
69  
70          return getFile(field, is, fileExt);
71      }
72  
73      protected String regexpStrip(String text) {
74          char[] array = text.toCharArray();
75  
76          for (int i = 0; i < array.length; i++) {
77              String s = String.valueOf(array[i]);
78  
79              if (!s.matches(PropsValues.LUCENE_FILE_EXTRACTOR_REGEXP_STRIP)) {
80                  array[i] = CharPool.SPACE;
81              }
82          }
83  
84          return new String(array);
85      }
86  
87  }